Hadzhipetkov, Iliya. “Ground Stone Tools from the Late Neolithic Site Hlebozavoda, Nova Zagora District”. Bulgarian e-Journal of Archaeology | Българско е-Списание за Археология 7, no. 2 (December 18, 2017): 261–274. Accessed June 30, 2022. https://be-ja.org/index.php/journal/article/view/be-ja-7-2-2017-261-274.